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- Title
Chitosan-coated sand and its application in a fixed-bed column to remove dyes in simple, binary, and real systems.
- Authors
Camara, Alisson Schons; Lütke, Sabrina Frantz; Pinheiro, Cláudio Pereira; Vieira, Mery Luiza Garcia; Sant'Anna Cadaval, Tito Roberto; de Almeida Pinto, Luiz Antonio
- Abstract
Adsorption of tartrazine yellow food dye, in a fixed-bed column, was carried out using a single system, a binary system (in the presence of sunset yellow food dye), and in a real effluent provides from an ice cream industry. Chitosan was used to coat sand particles by the dip-coating technique, and these particles were applied in fixed-bed adsorption. The assays were performed in flow rates of 3 mL min−1 and 5 mL min−1. The best performance was reached at 3 mL min−1. In this flow rate, for single and binary systems, the breakthrough time was 95 min and 65 min, and the maximum capacity of the column was around 595 mg g−1 and 497 mg g−1, respectively. In the assay conducted with the real effluent, the breakthrough time was 10 min, and the maximum adsorption capacity of the column was reduced to 191 mg g−1 for tartrazine dye. The dynamic models of Thomas and Yoon-Nelson were used, and both were suitable to represent the breakthrough curves.
- Subjects
TARTRAZINE; ICE cream industry; COLORING matter in food; SAND; ADSORPTION capacity
- Publication
Environmental Science & Pollution Research, 2020, Vol 27, Issue 30, p37938
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-020-09924-5